I am using the Facebook (FB) version 3.9 app on my Android 4.3 OS Samsung Galaxy 4 smartphone. With the phone connected to the internet via my home network WIFI, I am able to use the FB app to access my FB account home page, News Feed and Messages, but tapping other FB sidebar menu items including Events, Friends results in a "Connection Lost Tap to Retry" error. In the FB newsfeed, tapping on any post that contains a link results in a "This webpage is not available..." error. None of the aforementioned errors occur if I disable the phone's WIFI connection and use just my mobile 4g network for the internet connection. Note further my Windows 7 laptop connection to the internet via the same home network WIFI works flawlessly with IE11, Google Chrome and Firefox. Can anyone provide me an explanation for and/or resolution to these seemingly FB-specific issues? Thanks!